# -*- coding: utf-8 -*-
# @Time    : 2024/11/19 下午8:04
# @FileName: manage_tanant.py
# @Software: PyCharm
from fastapi import APIRouter
from sqlalchemy import delete

from dependencies import *

router = APIRouter()

from fastapi import HTTPException, Response
from models import Tenant, User  # 假设你已导入 Tenant 和 User 模型
from dependencies import SessionDep  # 假设 SessionDep 是数据库会话的依赖


# 列举所有租户
@router.get("/api/s1/tenant")
async def get_tenant(response: Response, session: SessionDep, current_user: User = Depends(get_current_user)):
    if current_user.role != 0:
        raise HTTPException(status_code=403, detail="Only Superadmin can list all tenants.")

    tenants = session.query(Tenant).all()  # 获取所有租户
    if not tenants:
        raise HTTPException(status_code=404, detail="No tenants found")

    tenant_data = []
    for tenant in tenants:
        # 获取该租户中 role=1 的第一个用户（如果存在）
        tenant_user = next((user for user in tenant.users if user.role == 1), None)

        # 获取该租户中除了 role=1 以外的用户数量
        user_num = len([user for user in tenant.users if user.role != 1])

        # 构建租户信息
        tenant_info = {
            "name": tenant.name,
            "username": tenant_user.username if tenant_user else None,  # 如果找到 role=1 的用户，返回其 username
            "user_num": user_num  # 除去 role=1 的用户数量
        }

        tenant_data.append(tenant_info)

    return {"tenants": tenant_data}


# 新增和修改租户
@router.post("/api/s1/tenant")
async def create_or_update_tenant(data: dict, session: SessionDep, current_user: User = Depends(get_current_user)):
    if current_user.role != 0:
        raise HTTPException(status_code=403, detail="Only Superadmin can add or update tenants.")

    name = data.get("name")
    username = data.get("username")
    password = data.get("password")

    # 验证是否缺少必要参数
    if not name:
        raise HTTPException(status_code=400, detail="Need more name")

    if username:
        # 如果 username 不为空，判断为新建租户
        # 检查租户名是否已存在
        tenant_query = select(Tenant).where(Tenant.name == name)
        existing_tenant = session.exec(tenant_query).first()

        if existing_tenant:
            raise HTTPException(status_code=409, detail="Tenant name already exists")

        # 创建新租户
        tenant = Tenant(name=name)
        session.add(tenant)
        session.commit()
        session.refresh(tenant)

        # 创建新用户
        user = User(
            username=username,
            password=password,  # 记得加密密码
            role=1,  # 默认role为1
            tenant_id=tenant.id,
        )
        session.add(user)

        # 提交事务
        session.commit()

        return {"message": "Tenant and User added successfully"}

    else:
        # 如果 username 为空，执行更新操作
        # 根据租户名称查找 Tenant
        tenant_query = select(Tenant).where(Tenant.name == name)
        tenant = session.exec(tenant_query).first()

        # 如果找不到对应的租户，抛出错误
        if not tenant:
            raise HTTPException(status_code=404, detail="Tenant not found")

        # 找到租户后，根据 tenant_id 查找该租户下的所有用户
        user_query = select(User).where(User.tenant_id == tenant.id)

        user = session.exec(user_query).first()

        # 如果找不到对应的用户，抛出错误
        if not user:
            raise HTTPException(status_code=404, detail="User not found")
        user.password = password
        session.add(user)
        session.commit()
        print(user)  # 测试用
        return {"message": "Tenant and User update successfully"}


# 删除租户
@router.delete("/api/s1/tenant")
async def delete_tenant(data: dict, session: SessionDep, current_user: User = Depends(get_current_user)):
    if current_user.role != 0:
        raise HTTPException(status_code=403, detail="Only Superadmin can delete tenants.")

    tenant_name = data.get("name")

    if not tenant_name:
        raise HTTPException(status_code=400, detail="Tenant name is required")

    # 查找租户
    tenant = session.exec(
        select(Tenant).where(Tenant.name == tenant_name)).first()
    if not tenant:
        raise HTTPException(status_code=404, detail="Tenant not found")

    # 删除与租户相关的用户
    stmt = delete(User).where(User.tenant_id == tenant.id)
    session.execute(stmt)

    # 删除租户
    session.delete(tenant)
    session.commit()

    return {"detail": "Tenant deleted successfully"}